Classical 6j-symbols and the tetrahedron

@article{Roberts1998Classical6A,
  title={Classical 6j-symbols and the tetrahedron},
  author={Justin Roberts},
  journal={arXiv: Mathematical Physics},
  year={1998}
}
  • J. Roberts
  • Published 15 December 1998
  • Mathematics
  • arXiv: Mathematical Physics
A classical 6j-symbol is a real number which can be associated to a labelling of the six edges of a tetrahedron by irreducible representations of SU(2). This abstract association is traditionally used simply to express the symmetry of the 6j-symbol, which is a purely algebraic object; however, it has a deeper geometric significance. Ponzano and Regge, expanding on work of Wigner, gave a striking (but unproved) asymptotic formula relating the value of the 6j-symbol, when the dimensions of the… 
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